Finding the Third Proportional to 713,690 and 978,636

Step by Step Solution

1. Step 1: Write the proportion equation
   713,690 : 978,636 = 978,636 : x
2. Step 2: Convert to fraction form
   713,690/978,636 = 978,636/x
3. Step 3: Cross multiply
   713,690x = 978,636 × 978,636
4. Step 4: Simplify right side
   713,690x = 957,728,420,496
5. Step 5: Solve for x
   x = 957,728,420,496/713,690
6. Step 6: Final answer
   x = 1,341,938.97